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Pàgina 238 - From the evidence it would appear that the submergence took place at the end of the fourteenth or the beginning of the fifteenth century.
Pàgina 4 - The Abode of Snow : Observations on a Journey from Chinese Tibet to the Indian Caucasus, through the Upper Valleys of the Himalaya. New Edition.
Pàgina 65 - It has often been vaguely asserted that plants are distinguished from animals by not having the power of movement. It should rather be said that plants acquire and display this power only when it is of some advantage to them...
Pàgina 204 - Imperial l6mo, over 300 pages, 70 Woodcuts, and Specimens of Prints by the best Permanent Processes. Second Edition, with an Appendix by the late Mr. HENRY FOXTALBOT.
Pàgina 253 - This reasoning applies word for word to the development of Bacteria from that floating matter which the electric beam reveals in the air, and in the absence of which no Bacterial life has been generated. There seems no flaw in this reasoning ; and it is so simple as to render it unlikely that the notion of Bacterial life developed from dead dust can ever gain currency among the members of a great scientific profession. A novel mode of experiment has been here pursued, and it may be urged that the...
Pàgina 252 - Into two other smaller apertures in the top of the case are inserted, air-tight, the open ends of two narrow tubes, intended to connect the interior space with the atmosphere. The tubes are bent several times up and down, so as to intercept and retain the particles carried by such feeble currents as changes of temperature might cause to set in between the outer and the inner air.
Pàgina 213 - Hence the rule has been derived, that the number of beats per second is equal to the difference of the number of •vibrations per second of the two sounds.
Pàgina 202 - MORELL, JR— Euclid Simplified in Method and Language. Being a Manual of Geometry. Compiled from the most important French Works, approved by the University of Paris and the Minister of Public Instruction.
Pàgina 254 - The warmth played upon one side of the bell-jar, causing currents within it ; and the day after the lighting of the stove, the beef-infusion gave birth to a tuft of mycelium. In this case the small spots of Penicillium might have readily escaped attention ; and had they done so we should have had three cases of "spontaneous generation'' far more striking than many that have been adduced.